DRTVWR-559 Make cloud pattern deterministic when cloud scroll is zero.

1 files changed, 10 insertions, 2 deletions

diff --git a/indra/newview/llenvironment.cpp b/indra/newview/llenvironment.cpp
index 9fe8b00071..51e5aae6de 100644
--- a/indra/newview/llenvironment.cpp
+++ b/indra/newview/llenvironment.cpp
@@ -1687,8 +1687,16 @@ void LLEnvironment::updateCloudScroll()
     
     if (mCurrentEnvironment->getSky() && !mCloudScrollPaused)
     {
-        LLVector2 cloud_delta = static_cast<F32>(delta_t)* (mCurrentEnvironment->getSky()->getCloudScrollRate()) / 100.0;
-        mCloudScrollDelta += cloud_delta;
+        LLVector2 rate = mCurrentEnvironment->getSky()->getCloudScrollRate();
+        if (rate.isExactlyZero())
+        {
+            mCloudScrollDelta.setZero();
+        }
+        else
+        {
+            LLVector2 cloud_delta = static_cast<F32>(delta_t) * (mCurrentEnvironment->getSky()->getCloudScrollRate()) / 100.0;
+            mCloudScrollDelta += cloud_delta;
+        }
     }
 
 }